#include <iostream>
using namespace std;

int main()
{
    int birth_year = 1997, age = 25;
    cout << "base\t\tbirth year\tage\n"
         << dec << "decimal\t\t" << birth_year << "\t\t" << age << '\n'
         << hex << "hexadecimal\t" << birth_year << "\t\t" << age << '\n'
         << oct << "octal\t\t" << birth_year << "\t\t" << age << '\n';
    return 0;
}